ISO 6721-8:2019 塑料 动力机械性能的测定 第8部分： 纵向和剪切振动 波传播法

标准编号：ISO 6721-8:2019

中文名称：塑料 动力机械性能的测定 第8部分： 纵向和剪切振动 波传播法

英文名称：Plastics — Determination of dynamic mechanical properties — Part 8: Longitudinal and shear vibration — Wave-propagation method

发布日期：2019-04

标准范围

This document describes an ultrasonic wave propagation method for determining the storage 
components of the longitudinal complex modulus L^* and the shear complex modulus G^* of polymers 
at discrete frequencies typically in the range 0,5 MHz to 5 MHz. The method is suitable for measuring 
materials with storage moduli in the range 0,01 GPa to 200 GPa and with loss factors below 0,1 at 
around 1 MHz. With materials that have a higher loss, significant errors in velocity measurement are 
introduced through waveform distortion and can only be reduced using procedures that are outside 
the scope of this document.
The method allows measurements to be made on small specimens, typically 50 mm × 20 mm × 5 mm, 
or small regions of larger specimens or sheets. It is therefore possible to obtain information on the 
homogeneity or anisotropy (see 10.5) of modulus in a specimen.

标准预览图